Agricultural Fires and Health at Birth
利用巴西卫星火灾监测、空气监测和出生登记数据，研究甘蔗收割火灾产生的烟雾对胎儿出生体重、孕期长度和宫内存活的影响，发现孕晚期暴露会损害健康。
Abstract Fire has long served as a tool in agriculture, but the practice's link with economic activity has made its health consequences difficult to study. Drawing on data from satellite-based fire detection systems, air monitors, and vital records in Brazil, we study how in utero exposure to smoke from sugarcane harvest fires affects health at birth. Exploiting daily changes in fire location and wind direction for identification, we find that late-pregnancy smoke exposure decreases birthweight, gestational length, and in utero survival. Fires less associated with smoke exposure predict improved health, highlighting the importance of disentangling pollution from its economic correlates.